Question

今天，我想从sql server中的几个表中删除所有测试记录。这是我要实现的目标。

Select ID from sourceTable where acctType='S' and acctroot<>0

假设此查询返回5行。

   | ID|
    ---
   | 1 |
   | 2 |
   | 3 |
   | 4 |
   | 5 |

现在这些是我需要清理的表

delete from tmpA where ID=1
delete from tmpB where acctID=1
delete from tmpC where userID = 1
delete from tmpD where sID=1
.
.
.
delete from tmpA where ID=2
delete from tmpB where acctID=2
delete from tmpC where userID =2
delete from tmpD where sID=2

我可以遍历源表并提取ID，然后从表中删除吗？我知道我可以使用联接，但是我想使用While循环来实现。.

Answer 1

就这么简单

... WHERE ID IN (Select ID from sourceTable where acctType='S' and acctroot<>0)

赞：

delete from tmpA where ID IN (Select ID from sourceTable where acctType='S' and acctroot<>0)
delete from tmpB where acctID IN (Select ID from sourceTable where acctType='S' and acctroot<>0)
delete from tmpC where userID IN (Select ID from sourceTable where acctType='S' and acctroot<>0)
delete from tmpD where sID IN (Select ID from sourceTable where acctType='S' and acctroot<>0)

Answer 2

您不需要WHILE循环，可以像使用WHERE EXISTS一样进行操作。

DELETE A 
FROM   tmpa a 
WHERE  EXISTS (SELECT 1 
               FROM   sourcetable s 
               WHERE  s.accttype = 'S' 
                      AND s.acctroot <> 0 
                      AND s.id = a.id)

您还需要对其他表执行相同的操作。

Answer 3

您不需要while循环

    delete from tmpA where ID IN (Select ID from sourceTable where acctType='S' and acctroot<>0)

Answer 4

确保ID在源表中存在的另一种方法是使用INNER JOIN。

DELETE T
FROM tmpA T
     INNER JOIN sourcetable S ON S.id = T.id AND S.accttype = 'S' AND S.acctroot  <> 0

Answer 5

尝试一下

Declare @Temp_Table Table (Id int identity(1,1),Table_Name varchar(30),Column_Name varchar(30))

insert into @Temp_Table
select 'tmpA','ID'
union all
select 'tmpB','acctID'
union all
select 'tmpC','userID'
union all
select 'tmpD','sID'

Declare @Counter int=1
        ,@Tot_Count int=0
        ,@Table_Name varchar(30)=''
        ,@Column_Name varchar(30)=''

select @Tot_Count=count(1) 
from @Temp_Table

While @Tot_Count >= @Counter
Begin

         Select @Table_Name=Table_Name
                ,@Column_Name=Column_Name
           From @Temp_Table
          Where Id=@Counter

           Exec
           (
                '
                 Delete A 
                   From '+@Table_Name+' A
             inner join sourceTable B 
                     on A.'+@Column_Name+'=B.ID
                  where B.acctType=''S'' 
                    and B.acctroot<>0
                '
           )

           Set @Counter+=1
End

使用特定值从多个表中删除记录

5 个答案: